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The MAX7219 does all the control and refresh work for you in driving either an 8×8 matrix display or 8 x 7-segment displays (usually these also have a dot so its really an 8-segment display) – 64 LEDs total. All you have to do is send it serial commands via the 4-pin SPI interface and it will auto-magically take care of the rest. Wiring is simplified as well, you only need to set the current level for all LEDs with a single resistor instead of 8 and you can also dim the entire display digitally. It’s a thru-hole chip so you can use it in any breadboard, perfboard or other project, although if you’re soldering it in, we suggest using a socket.
MAX7219CNG LED Matrix/Digit Display Driver – MAX7219 - [Link]
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One Response to “MAX7219CNG LED Matrix/Digit Display Driver – MAX7219”
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January 27th, 2013 at 2:26 am
Did one replace the Maxim IC with the compatible AS1107?
As of now the price is ca 3$.
Found the hint at ermicro:
http://www.ermicro.com/blog/?p=2292
Comment by klyx.
Nice to see your new article Mr. Besinga. MAX7219/MAX7221 are great IC from Maxim but unfortunately the price too high, $10 on low quantities. AS1106/AS1107 from Austria Microsystems are alternative version and full compatible (drop in replacement) with Maxim counterparts, the price are roughly half on low quantities